You stand up, back straight, proud, smile on your face, you walk up to him, introduce your self and shake his hand and by any luck, he'll smile at you, not give you some limp wrist wet fish handshake in return and you two chat lightly about anything!
You drop a compliment or two, slide in a nice joke or three, give him your best smile, let him get up close to you and you watch his body language and what he's looking at.
in a matter of minutes you can judge if he's interested or not and if he is, you got a man to mess with.
And it really is that simple and requires no more effort.
Yes sometimes your going to be rejected, sometimes your going to get an arsehole that plays you, sometimes he's just going to be a prick, but most men, young, old, stupid as shit or as smart as they come, will recognise you as someone to talk to, to get to know, to feel out (as it where).
Besides, after a hundred rejections, you kinda get a skin thick enough to take it
And yes, you can damned well do it, every single one of yas have something to give, every single man has strengths, every single man can do it.